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' R CUNDALL PAPER FOLDING MACHINE.

Patented June 3, 1890.

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R. CUNDALL.

PAPER FOLDING MACHINE.

No. 429,262. Patented June 3, 1890.

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(No Model.) 2 3 Sheets-Sheet a.

R. OUNDALL. PAPER FOLDING MACHINE.

No. 429,262; Pat nted June 3, 1890.

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UNITED STATES PATENT ()FFICE.

ROBERT CUNDALL, OF SHIPLEY, COUNTY OF YORK, ENGLAND.

PAPER-FOLDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 429,262 dated June 3,1890.

Application filed November 4, 1889. Serial No. 329,255. (No model.)

To all whom it may concern:

Be it known that I, ROBERT CUNDALL, a subject of the Queen of GreatBritain, residing in Shipley, in the county of York, England, haveinvented certain new and useful Improvements in Paper-Folding Machines,of which the following is a specification.

My invention has reference to machines employed for folding paper insections-such as note-paper and paper used for accountbooks and otherpurposes-the object of my invention being to fold the paper so that itwill not open out of itself when laid down, and this I accomplish bygiving the folded paper an additional nip at the folded edge only.

In carrying out my invention I employ any ordinary form of paper-foldingmachine having nipping-rollers, and under such nippingrollers or underthe striker I employ an arrangement of squeezers or an additional pairof nipping-rollers; but these rollers have a projecting knuckle or arecountersunk, so as to reduce the diameter except at a given point, whichprojects, the projecting part of one roller meeting the projecting partof the other roller as the two rollers revolve, so that as the foldedpaper leaves the ordinary folding-rollers or striker the said foldedpaper drops or is conducted with its folded edge between the squeezersor additional pair of rollers, which are timed to receive the foldededges of the paper for the purpose of giving it an additional nip orsqueeze, but only at the folded edge, which I find so flattens the paperas to prevent the open edges from separating or opening out.

Such being the nature of my said invention, I will now make reference tothe accompanying sheets of drawings, illustrative thereof, wherein-Figure 1 is an end elevation of such parts of a paper-folding machine asis necessary to show the application of my invention; Fig. 2, acrosssection of same, and Fig. 3 a plan view. Fig. 4 is a side viewshowing a modification in the means for pressing the squeezing-rollstogether. Figs. 5 to 10 each show a sectional side view of a modifiedform of the squeezers.

A represents a portion of the frame-work of the machine; B, a pair ofordinary nipping or folding rollers, the paper to be folded beinginserted between the said nipping-rollers by means of the striker 0working upon the fulcrum D, arranged in the ordinary manner.

My improvements are shown by letter E, which comprise an additional pairof nippingrollers of peculiar form, the journals of which are carried bythe square blocks F, supported in a slot or opening in the frame-work,such blocks F being forced together, so as to give the necessary nip tothe rollers, by means of steel springs H, the effect of which will bewell understood by mechanicians; but the use of springs is notabsolutely necessary, as the nip of the rollers can be obtained byscrews or other means. The additional pair of nipping-rollers are drivenby spur-gearing I, as shown in plan View, Fig. 3.

It will. be understood that the striker C inserts a number of sheets ofpaper between the first pair of nipping-rollers B, and that such sheetsof paper (shown at J) will drop with their folded edges between theadditional nipping-rollers E, which are so timed in their rotation thatthe proj ec'ting parts a of the said nipping-rollers are ready toreceive the folded edges just as they arrive from the upper rollers B orfrom the striker. Consequently the said papers are nipped or squeezed,but only at the folded edges, which so flattens the paper as to preventthe open edges from separating or opening out. The striker O enters thesheets of paper through the slotted table, (shown in the drawings,) andas soon as they are siezed by the folding-rolls E the striker is raised.The folding-rolls advance the paper and deliver it to the squeezers, asbefore described, while the striker is being raised up, so that a newsupply of sheets to be folded may be inserted beneath it.

In Fig. 4: I have shown that the additional pair of nipping-rollers,instead of working within blocks F, as already described, may workbetween caps or pedestals K and be drawn together by steel spiralsprings L.

L are bolts, which pass through the blocks K, and are secured to theframe A. The springs L are interposed between the long bosses on theframe and the nearest cap K, so that the two rolls have theirsqueezing-sun faces pressed toward each other.

Instead of employing rollers having projecting parts a, as shown inFigs. 1 and 2, I may employ a pair of rollers placed eccen' trically, asshown at M in Fig. 5, which will nip the folded sheets of paper in thesame manner as already described with regard to Figs. 1 and 2.

Instead of employing eccentric-rollers, as shown in Fig. 5, I may employa hinged lever G, (see Fig. 6,) made to close intermittently against thepart II by eccentric I, which gives the necessary nip to the said foldededges of the paper. The spiral spring J draws the levers away from thepart II.

Fig. 7 is a slight modification of Fig. (3, the action of the partsbeing the same.

Fig. 8 shows a pair of jaws K, hinged at L closed at a given time byeccentrics I and opened by springs; or box-cams may be employed, whichwould both open and close the jaws.

Fig. 9 is another modification of the means of givingintermittent motionto nipping devices. In this case a crank and connecting rod M isemployed to force part N against the part II.

In Fig. 10 I have shown a pair of nippingrollers 0, both of which arecarried on separate arms I, working on a fulcrum Q. These rollers arecaused to nip at a given time by cams R; but the rollers are separatedby springs J.

I wish to observe that the extra nip given to the folded edge of thesheets of paper. as above described, is accomplished without glazing orglossing the paper, as would be the case if the nipping-surfaces of therollers were more extended, or if the extra pair of nippingrollers wereof equal diameter throughout.

I claim as my invention- 1. In a paper-foldin g machine, thecombination, with a pair of rcvoluble folding-rolls, of a reciprocatingstriker above the rolls for entering the paper between them, and a pairof squeezers supported below the said foldingrolls for supplementingtheir action and subjecting the folded edges of the sheets to additionalcompression, the said folding-rolls being adapted to carry forward thefolded sheet-s of paper and to deliver them to the squeezers while thesaid striker is being raised to permit the insertion of more sheetsbeneath it, substantially as set forth.

2. In a paper-folding machine, the combination, with a pair of revolublefolding-rolls, of a reciprocating striker above the rolls for enteringthe paper between them, a pair of revoluble rolls provided withlongitudinallyopposed projections and journaled below the saidfolding-rolls for subjecting the folded edges of the sheets toadditional compression, and springs pressing said supplemental rollstoward each other, the said folding-rolls bein g adapted to carryforward the folded sheets of paper and to deliver them to the squeezerswhile the said striker is being raised to permit the insertion of moresheets beneath it, substantially as set forth.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

ROBERT CUNDALL.

Witnesses;

ARTHUR B. CROSSLEY,

7 IVew IlIarkct Street, Bradford. JOHN S. CUNDALL,

I Voodside, Baildon, S'lzipley.

